This topic was made as a place to talk about Pokemon moves that we created, as well as which Pokemon would be able to learn them! For each move, make sure to include the name, type, category, power, accuracy, base PP, description, effects, and notes (excluding fields that are not applicable, such as Power for Other-category moves.) I'll get things started with a bunch of my own moves to show you how it's done!

Name: Briar Patch
Type: Grass Category: Other
Power: N/A Accuracy: N/A
PP: 10
Description: The Pokemon launches seeds at the opponent's feet which sprout into thick thorny vines. Opposing Pokemon will be injured as they switch in.
Effect: This is an entry hazard that works the same way as Stealth Rock, except that its damage is based on the opponent's vulnerability to Grass-type moves instead of Rock-type moves.
Pokemon that can learn it: Bulbasaur line, Oddish line, Paras line (Egg move), Bellsprout line, Tangela line, Pineco line (Egg move), Nuzleaf (but not Seedot or Shiftry), Cacnea line, Lileep line, Roselia (but not Budew or Roserade), Snover line, Ferroseed line, Corsola (Egg move), Shaymin, Maractus, and Psuedoak.

Name: Dark Storm
Type: Dark Category: Special
Power: 120 Accuracy: 80
PP: 5
Description: The user summons a cloud of malevolent power to engulf and assault its foe.
Effect: This move inflicts damage. It has no secondary effect.
Pokemon that can learn it: Gastly line, Mewtwo, Umbreon, Murkrow line, Misdreavus line, Houndour line, Tyranitar, Duskull line, Shuppet line, Bagon line, Spiritomb, Giratina, Darkrai, Zorua line, Litwick line, Deino line, Kyurem, Panyck, Voltran, and Mistikal. (Maybe Lugia too, if Cipher gets ahold of it again.)

Name: Intangibility
Type: Ghost Category: Other
Power: N/A Accuracy: N/A Snatchable?: Yes
PP: 5
Description: The user fades out of the physical plane, becoming nigh-invulnerable against physical moves in exchange for some strength and speed.
Effect: The Pokemon fades out, causing all physical attacks to miss it 80% of the time. In exchange, it sacrifices 12.5% of its max HP (akin to the 50% HP sacrifice for Ghost-Curse or Belly Drum or the 25% HP sacrifice for Substitute), and all of its stats (except for Accuracy and Evasion) decrease by 1 stage. The effect lasts until the user faints or switches out, and can be transferred by Baton Pass.
Pokemon that can learn it: Gastly (but not Haunter or Gengar), Koffing line, Misdreavus line (Egg move), Castform (Egg move), Duskull (but not Dusclops or Dusknoir), Spiritomb (Egg move), Rotom, Giratina, Darkrai, Tornadus, Thundurus, Landorus, Cyclohm, Voltran, and Mistikal

Name: Lightning Surge
Type: Electric Category: Special
Power: 95 Accuracy: 75
PP: 5
Description: The user transforms into an immense thundercloud and engulfs its foe, repeatedly electrocuting its victim.
Effect: Hits 2 to 5 times.
Pokemon that can learn it: Voltran

Name: Snow Spiral
Type: Ice Category: Special
Power: 95 Accuracy: 75
PP: 5
Description: The user summons a great blizzard to engulf and trap its opponent, thoroughly immobilizing the foe with sheer subzero temperatures.
Effect: Traps the foe for 2 to 5 turns, forcing the user to select this move (a la Encore, but without any extra PP usage) for the duration but preventing the opponent from executing any moves.
Pokemon that can learn it: Frostran

Name: Corruption
Type: Poison Category: Other
Power: N/A Accuracy: 60 (30 in Sunny Day)
PP: 5
Description: The user turns into poisonous mist and attempts to infiltrate and take over its foe's brain.
Effect: You gain temporary control over the opponent's Pokemon, and it becomes poisoned. If the poison condition is cured, control of the infected Pokemon returns to your opponent. The opponent's Pokemon has a 40% chance of breaking free from your control and returning to your opponent; this increases by 10% in sunny weather, and any light-based move used on the Pokemon raises the chance by 20%; if the Pokemon breaks free in this manner, it remains poisoned. Light-based moves will also affect the user of Corruption instead of the victim. If either the Corruption-user or victim faints, control is automatically given back to the opponent. You may also give up your turn to release control of your opponent's Pokemon. This move is blocked by anything that could ordinarily block a Poison condition, including an already-existing status condition, Safeguard, Leaf Guard, Immunity, and being a Poison-type or Steel-type. Successfully using this move on a wild Pokemon ends the battle and captures it, but its happiness value will be set to 0 (regardless of what the happiness value of a freshly-caught Pokemon of that species ordinarily would be.)
Pokemon that can learn it: Mistikal

Name: Mind Rot
Type: Psychic Category: Special
Power: 80 Accuracy: 80
PP: 10
Description: The user eats away at its foe's mind, confusing it and sharply lowering its Sp. Attack.
Effect: When this move connects, it is guaranteed to confuse the foe and lower its Special Attack by 2 stages.
Pokemon that can learn it: Mistikal

Name: Dark Drill
Type: Dark Category: Physical
Power: 100 Accuracy: 100
PP: 10
Description: The user savagely drills into its foe with the intention of causing brutal injuries.
Effect: No added effects.
Pokemon that can learn it: Beedrill, Panyck, Spearow (Egg move), NidoranM (Egg move), Nidorino, Nidoking, NidoranF (Egg move), Rapidash, Rhyhorn (Egg move), Rhydon, Rhyperior, Goldeen line, Zapdos, Skarmory (Egg move), Murkrow line (Egg move), Deoxys (Attack & Speed Formes), Piplup line (Egg move), Drilbur line